There are different ways to implement one with the main difference being able to dislike as well. For example, on Sutta Central one you only like but on a place like Reddit you can upvote and also downvote. The former would be a better implementation for this kind of board.

My opinion is that being able to vote on posts, "like" buttons etc contributes to compulsive and immature mentalities that are a bit of an anathema for the kind of mental states Buddhists are trying to get in and stay in.

On the positive side, such things let you know that your writing was read and maybe appreciated. That feels good. On the other hand this isn't really positive. An intellectually mature adult should base their opinions what they think is true and it shouldn't matter to them whether other people appreciate it or not. It seems like that would be even more true for what Buddhists should be striving for.

I have seen many articles that such things encourage impulsive behaviour, also not where you want to be going as a Buddhist. People check their social media obsessively, looking to see their score. Such switching back and forth prevents people from going into deeper thought, deeper states of mind.

I think as close to a pure text enviornment with the ability to post multimedia dhamma files is the best for a Buddhist forum. I think buttons, memes, video responses instead of words, and little animations reflect immaturity in the mind and take away from a serious discussion.

Whatever a bhikkhu frequently thinks and ponders upon, that will become the inclination of his mind. - MN 19